In reply to CacCarnBeag: I have the pentax K5, and have abused it pretty badly, it's held up to all the abuse I've thrown at it, cold/ice in the winter in the lakes/wales, 40degrees+ temperatures in the Balkans, Sand from the Sahara etc...
You'd quite easily pick up a K5 used for £400 or even less these days. I was toying about upgrading the the K5IIs, but couldn't justify it as yet, maybe next year...